if your adding the screnshot to the forum then just right click on the screenshot then go to open with> internet explorer (or whatever browser you use)
the screenshot should come up on the opened internet page. save the photo, im sure ya know how to do that. upload the photo to your tinypic, photobucket, or whatever photo sharing account you have, then get the img code and copy/paste it to the thread you wish to post it on.
as for your mane situation...
copy/paste the mane file in the preset1 file to your preset file, edit it as you please, then give it the proper name for your preset